The rumors that T-Mobile may launch a Google Android device in September seem more and more plausible now with the details that Engadget found in the latest FCC documents (PDF files). This FCC approval is for the rumored HTC Dream device. The operating system is not mentioned in the FCC documents so it is possible this device could be a Windows Mobile device too. Either way, it looks like this may be T-Mobile USA's first high end device that supports their 1700 MHz 3G network. The FCC documents reveal it has WiFi, Bluetooth, and T-Mobile 3G support.